Look at the WhoCallsMe web site. This is apparently a debt scam. They called me and left a pre-recorded message saying that someone has filed a complaint against me and I needed to call back with xxxx account number to find out about the complaint. I deleted the message and blocked the number.
They say there is a complaint and give an account number and say call them back, it's the second time I've received this call.They don't identify themselves.